Developer credits
Git commits in Moodle 3.1.3 by Eric Merrill
commit 937ddb9e5a53544984f1b9671817df9cb369182f Author: Eric Merrill <merrill@oakland.edu> Date: Thu, 08 Sep 2016 05:13:46 +0800 Tag: v3.1.3 MDL-55725 search: Index proper time modified with indexed files